/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.ignite.ml.preprocessing.encoding;

/**
 * Describes Encoder sorting strategy to define mapping of integer values to values of categorical feature .
 *
 * @see EncoderTrainer
 */
public enum EncoderSortingStrategy {
    /** Descending order by label frequency (most frequent label assigned 0). */
    FREQUENCY_DESC,

    /** Ascending order by label frequency (least frequent label assigned 0). */
    FREQUENCY_ASC
}
